Nah, boot time is irrelevant. If the boot time does matter one would use other measures. Like failover, redundancy, or k8s (though I don't have experience w/that as of yet).
I've had various consumer grade (but branded) USB sticks running Raspberry Pi OS, EdgeOS and Proxmox fail on me to the point where I use an USB to NVMe or USB to SATA. Why? I've tried industrial grade aMLC/MLC/SLC flash and performance is worse, and cost is high. For example, for Proxmox or EdgeOS you need at least 4 GB storage. They've never failed me but SATA or NVMe have high MTBF. On Raspberry Pis I've opted for log2ram on consumer grade (but branded) microSD with great effect. Another option is not log at all, or use e.g. rsyslog.
I've had various consumer grade (but branded) USB sticks running Raspberry Pi OS, EdgeOS and Proxmox fail on me to the point where I use an USB to NVMe or USB to SATA. Why? I've tried industrial grade aMLC/MLC/SLC flash and performance is worse, and cost is high. For example, for Proxmox or EdgeOS you need at least 4 GB storage. They've never failed me but SATA or NVMe have high MTBF. On Raspberry Pis I've opted for log2ram on consumer grade (but branded) microSD with great effect. Another option is not log at all, or use e.g. rsyslog.